C#/Java: Some minor variable name changes and QL Doc updates.

Author: michaelnebel

csharp/ql/src/utils/model-generator/CaptureSourceModels.ql

@@ -7,6 +7,6 @@
 private import internal.ModelGeneratorUtils
 private import internal.CaptureModels
 
-from TargetApi api, string sink
-where sink = captureSource(api)
-select sink order by sink
+from TargetApi api, string source
+where source = captureSource(api)
+select source order by source

csharp/ql/src/utils/model-generator/internal/ModelGeneratorUtilsSpecific.qll

@@ -41,7 +41,7 @@ private string parameterAccess(Parameter p) {
 }
 
 /**
- * Gets the model string representation of the parameter node `p`.
+ * Gets the CSV string representation of the parameter node `p`.
  */
 string parameterNodeAsInput(DataFlow::ParameterNode p) {
   result = parameterAccess(p.asParameter())
@@ -55,7 +55,7 @@ private Parameter getParameter(ReturnNodeExt node, ParameterPosition pos) {
 }
 
 /**
- * Gets the model string represention of the the return node `node`.
+ * Gets the CSV string represention of the the return node `node`.
  */
 string returnNodeAsOutput(ReturnNodeExt node) {
   if node.getKind() instanceof ValueReturnKind

java/ql/src/utils/model-generator/CaptureSourceModels.ql

@@ -7,6 +7,6 @@
 private import internal.ModelGeneratorUtils
 private import internal.CaptureModels
 
-from TargetApi api, string sink
-where sink = captureSource(api)
-select sink order by sink
+from TargetApi api, string source
+where source = captureSource(api)
+select source order by source

java/ql/src/utils/model-generator/internal/ModelGeneratorUtilsSpecific.qll

@@ -136,7 +136,7 @@ private string parameterAccess(Parameter p) {
 }
 
 /**
- * Gets the model string representation of the parameter node `p`.
+ * Gets the CSV string representation of the parameter node `p`.
  */
 string parameterNodeAsInput(DataFlow::ParameterNode p) {
   result = parameterAccess(p.asParameter())
@@ -145,7 +145,7 @@ string parameterNodeAsInput(DataFlow::ParameterNode p) {
 }
 
 /**
- * Gets the model string represention of the the return node `node`.
+ * Gets the CSV string represention of the the return node `node`.
  */
 string returnNodeAsOutput(ReturnNodeExt node) {
   if node.getKind() instanceof ValueReturnKind